linux-kernel - [PATCH] HID: usbhid: fix suspend timeout due to RUNNING bits

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Date:	Fri,  2 Sep 2011 17:07:27 -0700
From:	Benson Leung <bleung@...omium.org>
To:	jkosina@...e.cz, linux-usb@...r.kernel.org,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	bleung@...omium.org
Subject: [PATCH] HID: usbhid: fix suspend timeout due to RUNNING bits

hid_submit_ctrl and hid_submit_out should return error
codes when HID_REPORTED_IDLE is set by hid_suspend.
This will allow the output and control completion
handlers to clear HID_OUT_RUNNING and HID_CTRL_RUNNING
so hid_suspend succeeds.

Previously, if there were outstanding out messages
or control messages while hid_suspend was called,
hid_suspend would fail because usbhid_wait_io would time
out.

This condition happens with USB keyboards with both capslock and
numlock leds enabled at suspend time. Control requests
will come down to the hid-core to disable both leds, with
hid_suspend being called between the two being submitted.

Signed-off-by: Benson Leung <bleung@...omium.org>
---
 drivers/hid/usbhid/hid-core.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index a9fa294..cf5c106 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -326,6 +326,8 @@ static int hid_submit_out(struct hid_device *hid)
 			return -1;
 		}
 		usbhid->last_out = jiffies;
+	} else {
+		return -1;
 	}

 	return 0;
@@ -385,6 +387,8 @@ static int hid_submit_ctrl(struct hid_device *hid)
 			return -1;
 		}
 		usbhid->last_ctrl = jiffies;
+	} else {
+		return -1;
 	}

 	return 0;
-- 
1.7.1

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